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Complex formation of immunoglobulin superfamily molecules Side-IV and Beat-IIb regulates synaptic specificity.

Jiro Osaka | Arisa Ishii | Xu Wang | Riku Iwanaga | Hinata Kawamura | Shogo Akino | Atsushi Sugie | Satoko Hakeda-Suzuki | Takashi Suzuki
Cell reports | 2024

Neurons establish specific synapses based on the adhesive properties of cell-surface proteins while also retaining the ability to form synapses in a relatively non-selective manner. However, comprehensive understanding of the underlying mechanism reconciling these opposing characteristics remains incomplete. Here, we have identified Side-IV/Beat-IIb, members of the Drosophila immunoglobulin superfamily, as a combination of cell-surface recognition molecules inducing synapse formation. The Side-IV/Beat-IIb combination transduces bifurcated signaling with Side-IV's co-receptor, Kirre, and a synaptic scaffold protein, Dsyd-1. Genetic experiments and subcellular protein localization analyses showed the Side-IV/Beat-IIb/Kirre/Dsyd-1 complex to have two essential functions. First, it narrows neuronal binding specificity through Side-IV/Beat-IIb extracellular interactions. Second, it recruits synapse formation factors, Kirre and Dsyd-1, to restrict synaptic loci and inhibit miswiring. This dual function explains how the combinations of cell-surface molecules enable the ranking of preferred interactions among neuronal pairs to achieve synaptic specificity in complex circuits in vivo.

Pubmed ID: 38381608 RIS Download

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Goat anti-Mouse IgG (H+L) Secondary Antibody, HRP (antibody)

RRID:AB_1185566

This polyclonal secondary targets IgG (H+L)

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Anti-α-Tubulin antibody (antibody)

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Anti-Myc Tag, clone 4A6 (antibody)

RRID:AB_568800

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y[1] v[1]; P{y[+t7.7] v[+t1.8]=WKO.5-C1}attP40 (organism)

RRID:BDSC_84159

Drosophila melanogaster with name y[1] v[1]; P{y[+t7.7] v[+t1.8]=WKO.5-C1}attP40 from BDSC.

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y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=TKO.GS04527}attP40 (organism)

RRID:BDSC_82064

Drosophila melanogaster with name y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=TKO.GS04527}attP40 from BDSC.

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y[1] M{RFP[3xP3.PB] GFP[E.3xP3]=vas-int.Dm}ZH-2A w[*]; PBac{y[+]-attP-3B}VK00033 (organism)

RRID:BDSC_24871

Drosophila melanogaster with name y[1] M{RFP[3xP3.PB] GFP[E.3xP3]=vas-int.Dm}ZH-2A w[*]; PBac{y[+]-attP-3B}VK00033 from BDSC.

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y[1] M{RFP[3xP3.PB] GFP[E.3xP3]=vas-int.Dm}ZH-2A w[*]; PBac{y[+]-attP-3B}VK00037 (organism)

RRID:BDSC_24872

Drosophila melanogaster with name y[1] M{RFP[3xP3.PB] GFP[E.3xP3]=vas-int.Dm}ZH-2A w[*]; PBac{y[+]-attP-3B}VK00037 from BDSC.

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y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=nos-Cas9.R}attP2 (organism)

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Drosophila melanogaster with name y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=nos-Cas9.R}attP2 from BDSC.

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y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=nos-Cas9.R}attP40 (organism)

RRID:BDSC_78781

Drosophila melanogaster with name y[1] sc[*] v[1] sev[21]; P{y[+t7.7] v[+t1.8]=nos-Cas9.R}attP40 from BDSC.

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y[1] w[*]; Mi{PT-GFSTF.1}beat-IV[MI05715-GFSTF.1]/TM3, Sb[1] Ser[1] (organism)

RRID:BDSC_66506

Drosophila melanogaster with name y[1] w[*]; Mi{PT-GFSTF.1}beat-IV[MI05715-GFSTF.1]/TM3, Sb[1] Ser[1] from BDSC.

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y[1] w[*]; Mi{PT-GFSTF.0}beat-IIb[MI03102-GFSTF.0] (organism)

RRID:BDSC_59406

Drosophila melanogaster with name y[1] w[*]; Mi{PT-GFSTF.0}beat-IIb[MI03102-GFSTF.0] from BDSC.

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pr[1] pwn[1] P{ry[+t7.2]=hsFLP}38/CyO; Ki[1] kar[1] ry[506] (organism)

RRID:BDSC_5258

Drosophila melanogaster with name pr[1] pwn[1] P{ry[+t7.2]=hsFLP}38/CyO; Ki[1] kar[1] ry[506] from BDSC.

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w[*]; P{y[+t7.7] w[+mC]=R27G05-FLPG5.PEST}attP40/CyO, P{w[+mC]=GAL4-Kr.C}DC3, P{w[+mC]=UAS-GFP.S65T}DC7; TM2/TM6B, Tb[1] (organism)

RRID:BDSC_55765

Drosophila melanogaster with name w[*]; P{y[+t7.7] w[+mC]=R27G05-FLPG5.PEST}attP40/CyO, P{w[+mC]=GAL4-Kr.C}DC3, P{w[+mC]=UAS-GFP.S65T}DC7; TM2/TM6B, Tb[1] from BDSC.

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w[*]; P{y[+t7.7] w[+mC]=20C11-FLPG5}attP40/CyO; TM2/TM6B, Tb[1] (organism)

RRID:BDSC_55766

Drosophila melanogaster with name w[*]; P{y[+t7.7] w[+mC]=20C11-FLPG5}attP40/CyO; TM2/TM6B, Tb[1] from BDSC.

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w[*]; P{y[+t7.7] w[+mC]=LexAop-tdTomato.Myr}su(Hw)attP5 PBac{y[+mDint2] w[+mC]=brp(FRT.Stop)V5-2A-LexA-VP16}VK00018/CyO; TM2/TM6B, Tb[1] (organism)

RRID:BDSC_56142

Drosophila melanogaster with name w[*]; P{y[+t7.7] w[+mC]=LexAop-tdTomato.Myr}su(Hw)attP5 PBac{y[+mDint2] w[+mC]=brp(FRT.Stop)V5-2A-LexA-VP16}VK00018/CyO; TM2/TM6B, Tb[1] from BDSC.

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w[*]; Bl[1]/CyO, P{w[+mC]=GAL4-Kr.C}DC3, P{w[+mC]=UAS-GFP.S65T}DC7; PBac{y[+mDint2] w[+mC]=brp(FRT.Stop)GFP}VK00033 (organism)

RRID:BDSC_55753

Drosophila melanogaster with name w[*]; Bl[1]/CyO, P{w[+mC]=GAL4-Kr.C}DC3, P{w[+mC]=UAS-GFP.S65T}DC7; PBac{y[+mDint2] w[+mC]=brp(FRT.Stop)GFP}VK00033 from BDSC.

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Drosophila melanogaster with name w[1118] P{y[+t7.7] w[+mC]=hs-FLPG5.PEST}attP3; P{y[+t7.7] w[+mC]=10xUAS(FRT.stop)myr::smGdP-OLLAS}attP2 PBac{y[+mDint2] w[+mC]=10xUAS(FRT.stop)myr::smGdP-HA}VK00005 P{10xUAS(FRT.stop)myr::smGdP-V5-THS-10xUAS(FRT.stop)myr::smGdP-FLAG}su(Hw)attP1 from BDSC.

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RRID:BDSC_63809

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RRID:BDSC_70646

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RRID:BDSC_75895

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